Electrochemical ion transfer with thin films of poly(3-octylthiophene)
© 2016 American Chemical Society.We report on the limiting conditions for ion-transfer voltammetry between an ion-exchanger doped and plasticized poly(vinyl chloride) (PVC) membrane and an electrolyte solution that was triggered via the oxidation of a poly(3-octylthiophene) (POT) solid-contact (SC),...
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| Format: | Journal Article |
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American Chemical Society
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/52510 |
| _version_ | 1848758944200130560 |
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| author | Cuartero, M. Acres, R. De Marco, Roland Bakker, E. Crespo, G. |
| author_facet | Cuartero, M. Acres, R. De Marco, Roland Bakker, E. Crespo, G. |
| author_sort | Cuartero, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 American Chemical Society.We report on the limiting conditions for ion-transfer voltammetry between an ion-exchanger doped and plasticized poly(vinyl chloride) (PVC) membrane and an electrolyte solution that was triggered via the oxidation of a poly(3-octylthiophene) (POT) solid-contact (SC), which was unexpectedly related to the thickness of the POT SC. An electropolymerized 60 nm thick film of POT coated with a plasticized PVC membrane exhibited a significant sodium transfer voltammetric signal whereas a thicker film (180 nm) did not display a measurable level of ion transfer due to a lack of oxidation of thick POT beneath the membrane film. In contrast, this peculiar phenomenon was not observed when the POT film was in direct contact with an organic solvent-based electrolyte. This evidence is indicative of three key points: (i) the coated membrane imposes a degree of rigidity to the system, which restricts the swelling of the POT film and its concomitant p-doping; (ii) this phenomenon is exacerbated with thicker POT films due to an initial morphology (rougher comprising a network of large POT nanoparticles), which gives rise to a diminished surface area and electrochemical reactivity in the POT SC; (iii) the rate of sodium transfer is higher with a thin POT film due to a smoother surface morphology made up of a network of smaller POT nanoparticles with an increased surface area and electrochemical reactivity. A variety of techniques including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), ellipsometry, scanning electron microscopy (SEM), atomic force microscopy (AFM), and synchrotron radiation-X-ray photoelectron spectroscopy (SR-XPS) were used to elucidate the mechanism of the POT thickness/POT surface roughness dependency on the electrochemical reactivity of the PVC/POT SC system. |
| first_indexed | 2025-11-14T09:52:02Z |
| format | Journal Article |
| id | curtin-20.500.11937-52510 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:52:02Z |
| publishDate | 2016 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-525102017-09-13T15:39:23Z Electrochemical ion transfer with thin films of poly(3-octylthiophene) Cuartero, M. Acres, R. De Marco, Roland Bakker, E. Crespo, G. © 2016 American Chemical Society.We report on the limiting conditions for ion-transfer voltammetry between an ion-exchanger doped and plasticized poly(vinyl chloride) (PVC) membrane and an electrolyte solution that was triggered via the oxidation of a poly(3-octylthiophene) (POT) solid-contact (SC), which was unexpectedly related to the thickness of the POT SC. An electropolymerized 60 nm thick film of POT coated with a plasticized PVC membrane exhibited a significant sodium transfer voltammetric signal whereas a thicker film (180 nm) did not display a measurable level of ion transfer due to a lack of oxidation of thick POT beneath the membrane film. In contrast, this peculiar phenomenon was not observed when the POT film was in direct contact with an organic solvent-based electrolyte. This evidence is indicative of three key points: (i) the coated membrane imposes a degree of rigidity to the system, which restricts the swelling of the POT film and its concomitant p-doping; (ii) this phenomenon is exacerbated with thicker POT films due to an initial morphology (rougher comprising a network of large POT nanoparticles), which gives rise to a diminished surface area and electrochemical reactivity in the POT SC; (iii) the rate of sodium transfer is higher with a thin POT film due to a smoother surface morphology made up of a network of smaller POT nanoparticles with an increased surface area and electrochemical reactivity. A variety of techniques including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), ellipsometry, scanning electron microscopy (SEM), atomic force microscopy (AFM), and synchrotron radiation-X-ray photoelectron spectroscopy (SR-XPS) were used to elucidate the mechanism of the POT thickness/POT surface roughness dependency on the electrochemical reactivity of the PVC/POT SC system. 2016 Journal Article http://hdl.handle.net/20.500.11937/52510 10.1021/acs.analchem.6b01800 American Chemical Society restricted |
| spellingShingle | Cuartero, M. Acres, R. De Marco, Roland Bakker, E. Crespo, G. Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title | Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title_full | Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title_fullStr | Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title_full_unstemmed | Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title_short | Electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| title_sort | electrochemical ion transfer with thin films of poly(3-octylthiophene) |
| url | http://hdl.handle.net/20.500.11937/52510 |